/*
 * Copyright 2019 New Vector Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package im.vector.activity

/**
 * A fragment should implement this interface if it wants to intercept backPressed events.
 * Any activity extending VectorAppCompatActivity will propagate back pressed event to child
 * fragment that implements it.
 */
interface HandleBackParticipant {

    /**
     * Returns true, if the on back pressed event has been handled by this Fragment.
     * Otherwise return false
     */
    fun onBackPressed(): Boolean

}